Signaling high dynamic range and wide color gamut content in transport streams

Abstract

A program map table in a transport stream comprising an elementary stream identifier indicating a particular elementary stream, a high dynamic range flag indicating the presence or absence of high dynamic range content within the elementary stream, and a wide color gamut flag indicating the presence or absence of wide color gamut content within the elementary stream.

The invention claimed is: 
     
       1. An apparatus including a processor receiving a transport stream, the apparatus comprising:
 (a) said transport stream includes a program map table; 
 (b) said program map table indicates an elementary stream with a stream type and an elementary stream identifier; 
 (c) said elementary stream indicates a High Efficiency Video Coding (HEVC) stream by using a particular stream type value; 
 (d) a High Efficiency Video Coding video descriptor associated with said HEVC stream signaling a presence or an absence of a high dynamic range (HDR) content and a wide color gamut (WCG) content in said elementary stream; 
 (e) wherein said high dynamic range (HDR) content and said wide color gamut (WCG) content are signaled by separately in two flags or combined into two bits of a single syntax element that indicates said presence or absence of said high dynamic range (HDR) content and/or said wide color gamut (WCG) content. 
 
     
     
       2. The apparatus of  claim 1 , wherein said syntax element signals both the presence or absence of HDR and/or WCG using two bits. 
     
     
       3. The apparatus of  claim 2 , wherein said HEVC video descriptor is included in a bitstream encoded with HEVC. 
     
     
       4. The apparatus of  claim 1 , wherein said stream type identifier indicates an encoding scheme used to encode said elementary stream. 
     
     
       5. The apparatus of  claim 4 , wherein said stream type identifier is set to “0x24” to indicate that said elementary stream is a bitstream encoded with High Efficiency Video Coding (HEVC). 
     
     
       6. A method of decoding a video included in a transport stream, the method comprising:
 (a) receiving at a decoder said transport stream that includes a program map table; 
 (b) receiving at said decoder said program map table that indicates an elementary stream with stream type and elementary stream identifier; 
 (c) receiving at said decoder said elementary stream that indicates a High Efficiency Video Coding (HEVC) stream by using a particular stream type value; 
 (d) receiving at said decoder an HEVC video descriptor associated with said HEVC stream signaling a presence or absence of a high dynamic range (HDR) content and a wide color gamut (WCG) content in said elementary stream; 
 (e) wherein said high dynamic range (HDR) content and said wide color gamut (WCG) content are signaled separately in 2 flags or combined into 2 bits of a single syntax element that indicates the presence or absence of HDR and/or WCG content. 
 
     
     
       7. The method of  claim 6  further comprising performing at said decoder one or more post-processing operations on values decoded from said elementary stream to reconstruct high dynamic range and/or wide color gamut content. 
     
     
       8. The method of  claim 7 , wherein said one or more post-processing operations are identified by supplemental enhancement information within said elementary stream. 
     
     
       9. The method of  claim 7 , wherein said one or more post-processing operations are identified by video usability information within said elementary stream.